/Engine/Plugins/Runtime/MassGameplay/Source/MassReplication/Public/MassReplicationTypes.h
Handle of each Client on the server. A Client is defined as a player controller with a non nullptr parent NetConnection.
[USTRUCT](Programming/UnrealArchitecture/Reference/Structs)() struct FMassClientHandle : public [FIndexedHandleBase](API\Runtime\AIModule\FIndexedHandleBase)